JP2018142843A5 - - Google Patents
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- JP2018142843A5 JP2018142843A5 JP2017035769A JP2017035769A JP2018142843A5 JP 2018142843 A5 JP2018142843 A5 JP 2018142843A5 JP 2017035769 A JP2017035769 A JP 2017035769A JP 2017035769 A JP2017035769 A JP 2017035769A JP 2018142843 A5 JP2018142843 A5 JP 2018142843A5
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- 238000001514 detection method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Description
前記付加ビット出力部６４は、前記ゼロラン数／グループ番号認識部６３から送信されたハフマン符号のビット長に係るデータ及び付加ビット長に係るデータに基づいて、４番目の可変長符号データから前記付加ビット長に応じた付加ビットに係るデータを抽出する。そして、付加ビット出力部６４は、前記ゼロラン数／グループ番号認識部６３から送信されたゼロラン数に係るデータ、及び抽出した付加ビットに係るデータを前記周波数変換部１２５に送信し、１番目〜４番目の可変長符号データの総ビット長に係るデータを前記入力制御部２１に送信するとともに、入力された全てのデータを破棄する処理を行う。 The additional bit output unit 64 performs, based on the data relating to the bit length of the Huffman code and the data relating to the additional bit length transmitted from the zero run number / group number recognizing unit 63, the additional data from the fourth variable length code data. The data related to the additional bits according to the bit length is extracted. The additional bit output unit 64 transmits the data related to the number of zero runs transmitted from the zero run number / group number recognition unit 63 and the data related to the extracted additional bits to the frequency conversion unit 125, and outputs the first to fourth data. The data relating to the total bit length of the second variable-length code data is transmitted to the input control unit 21, and a process of discarding all the input data is performed.
１ 画像復号化装置
１０ ハフマン復号化部
２０ 符号解析部
２１ 入力制御部
３１ １次解析処理部
３２ 符号語検出部
３３ ゼロラン数／グループ番号認識部
３４ 付加ビット出力部
４１ ２次解析処理部
４２ 符号語検出部
４３ ゼロラン数／グループ番号認識部
４４ 付加ビット出力部
５１ ３次解析処理部
５２ 符号語検出部
５３ ゼロラン数／グループ番号認識部
５４ 付加ビット出力部
６１ ４次解析処理部
６２ 符号語検出部
６３ ゼロラン数／グループ番号認識部
６４ 付加ビット出力部
１１１ 符号入力部
１１２ 内部バッファ
１１３ 前部マーカ解析部
１１４ 最終マーカ解析部
１２５ 周波数変換部
１３０ 逆ジグザグスキャン部
１４０ 逆量子化部
１５０ ＩＤＣＴ部
DESCRIPTION OF SYMBOLS 1 Image decoding apparatus 10 Huffman decoding part 20 Code analysis part 21 Input control part 31 Primary analysis processing part 32 Codeword detection part 33 Zero run number / group number recognition part 34 Additional bit output part 41 Secondary analysis processing part 42 code Word detection unit 43 Zero run number / group number recognition unit 44 Additional bit output unit 51 Tertiary analysis processing unit 52 Code word detection unit 53 Zero run number / group number recognition unit 54 Additional bit output unit 61 Quaternary analysis processing unit 62 Code word detection Unit 63 zero run number / group number recognition unit 64 additional bit output unit 111 code input unit 112 internal buffer 113 front marker analysis unit 114 final marker analysis unit 125 frequency conversion unit 130 inverse zigzag scan unit 140 inverse quantization unit 150 IDCT unit
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017035769A JP6821184B2 (en) | 2017-02-28 | 2017-02-28 | Image decoder |
| US16/489,237 US11251808B2 (en) | 2017-02-28 | 2018-01-10 | Image decoding device |
| PCT/JP2018/000260 WO2018159105A1 (en) | 2017-02-28 | 2018-01-10 | Image-decoding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017035769A JP6821184B2 (en) | 2017-02-28 | 2017-02-28 | Image decoder |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2018142843A JP2018142843A (en) | 2018-09-13 |
| JP2018142843A5 true JP2018142843A5 (en) | 2020-03-12 |
| JP6821184B2 JP6821184B2 (en) | 2021-01-27 |
Family
ID=63371186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017035769A Active JP6821184B2 (en) | 2017-02-28 | 2017-02-28 | Image decoder |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11251808B2 (en) |
| JP (1) | JP6821184B2 (en) |
| WO (1) | WO2018159105A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3292221B2 (en) * | 1993-09-14 | 2002-06-17 | ソニー株式会社 | Image compression coding method |
| JP3260925B2 (en) | 1993-09-28 | 2002-02-25 | キヤノン株式会社 | Image processing device |
| US6961474B1 (en) * | 1998-02-27 | 2005-11-01 | Shikino High-Tech Co., Ltd. | Huffman encoder for encoding/decoding DCT coefficients |
| JP2002237754A (en) * | 2001-02-07 | 2002-08-23 | Canon Inc | Variable length decoding device and its method |
| US6603413B2 (en) | 2001-02-07 | 2003-08-05 | Canon Kabushiki Kaisha | Variable-length decoding apparatus and method |
| JP2004179752A (en) * | 2002-11-25 | 2004-06-24 | Kawasaki Microelectronics Kk | Huffman decoder |
| JP4434155B2 (en) * | 2006-02-08 | 2010-03-17 | ソニー株式会社 | Encoding method, encoding program, and encoding apparatus |
| JP5472610B2 (en) * | 2009-11-26 | 2014-04-16 | 大日本印刷株式会社 | Method and apparatus for encoding / decoding numeric data string |
-
2017
- 2017-02-28 JP JP2017035769A patent/JP6821184B2/en active Active
-
2018
- 2018-01-10 US US16/489,237 patent/US11251808B2/en active Active
- 2018-01-10 WO PCT/JP2018/000260 patent/WO2018159105A1/en active Application Filing
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